# Connect ChatGPT to LotsMail Canonical page: https://lotsmail.to/agents/chatgpt Steps checked: 2026-10-16 Ask ChatGPT to read, search and draft replies in your LotsMail business inbox. Add LotsMail to ChatGPT as a remote MCP server and sign in once. MCP server URL: https://api.lotsmail.to/mcp REST API docs: https://api.lotsmail.to/docs Setup instructions for your agent: https://lotsmail.to/skill.md ## What you can do once connected - Read and search your mailboxes: list conversations by folder, open a whole conversation and find messages by person, subject or text. - Write drafts and reply drafts that wait in Drafts for you to review and send. - Send, reply and send a draft, once you have turned sending on for that mailbox, and check whether each message was delivered. - Mark messages read or unread, star them and move them between inbox, archive, trash and spam. - Start domain setup and show how your domains are paid for. Domains, DNS, team access and agent permissions stay yours, in the dashboard. The LotsMail dashboard does the whole job too: a full inbox on every device, plus domains, mailboxes, team and agent permissions. Your agent for speed, the dashboard for control. ## You need - Adding a custom connector with full read and write depends on your ChatGPT plan, and on some plans only admins can add one. Check OpenAI’s current plan details. - A LotsMail account. You can create one during sign-in. ## Connect ChatGPT to LotsMail 1. **Add a custom MCP server.** In ChatGPT on the web, go to Plugins, select +, then Add custom MCP server. 2. **Enter the LotsMail connection.** Name it LotsMail. Under Connection, enter the server URL below, then choose OAuth for authentication. Tick I understand and want to continue, then select Create as a plugin. ``` https://api.lotsmail.to/mcp ``` 3. **Install it and sign in.** Install the LotsMail plugin, click Connect and sign in to LotsMail. New users can create an account during this step. Allow ChatGPT to use LotsMail when prompted. 4. **Use it in a chat.** In a new chat, type @, select LotsMail and ask for something read-only first. ``` List my LotsMail mailboxes ``` ## What to ask next - “What came in for sales@ today? Summarise anything that needs a reply.” - “Draft a reply to the latest message from the supplier and leave it for me to check.” - “Find last month’s invoice from our supplier and tell me the amount and due date.” - “Check whether my last email to Acme was delivered.” ## Questions and troubleshooting ### How do I connect ChatGPT to LotsMail? In ChatGPT on the web, go to Plugins, select +, then Add custom MCP server. Name it LotsMail, enter https://api.lotsmail.to/mcp under Connection, choose OAuth, tick I understand and want to continue and select Create as a plugin. Install it, sign in, then in a new chat type @, select LotsMail and ask “List my LotsMail mailboxes”. Adding a custom connector with full read and write depends on your ChatGPT plan, and on some plans only admins can add one. Check OpenAI’s current plan details. ### Can I connect LotsMail with a Free or Go ChatGPT account? Adding a custom connector with full read and write depends on your ChatGPT plan, and on some plans only admins can add one. Check OpenAI’s current plan details. You can also connect LotsMail to Claude or another MCP agent. ### Do I need an API key to use LotsMail with ChatGPT? No. ChatGPT signs in to LotsMail in your browser. API keys are for the REST API, for scripts and your own apps. ### What does LotsMail cost? Current plans and prices are on https://lotsmail.to/pricing. Your agent’s own plan or usage fees are separate. ### Can my agent send email without me? Only if you turn on sending for that mailbox. Sending is off until you do. With read or draft access your agent can search, read and write drafts that wait in Drafts for you to review and send. ### Which mailboxes can my agent open? Only the mailboxes you can open yourself. For each one you choose what agents may do: read and search, write drafts, or send. Owners do not get private mailboxes by default. ### Can I limit who my agent emails? Yes. A mailbox can be restricted to a list of addresses it may send to, and any other recipient refuses the whole send. Only a workspace owner or admin changes restrictions, in the dashboard. ### Can my agent change my domain or DNS? No. It can start domain setup, which gives you the steps and the dashboard link. Domains, DNS, billing, team access and agent permissions stay with you, in the dashboard. ### I cannot find Add custom MCP server If you can’t add the connector: Adding a custom connector with full read and write depends on your ChatGPT plan, and on some plans only admins can add one. Check OpenAI’s current plan details. ### ChatGPT does not use LotsMail in my chat In a new chat, type @ and select LotsMail, confirm it is connected and finish any authorization prompt. Ask ChatGPT “List my LotsMail mailboxes” before anything else. If ChatGPT still can’t use its tools, your ChatGPT plan may not allow custom connectors with full read and write. Check OpenAI’s current plan details. ## Sources - [OpenAI: Connect and test your plugin](https://developers.openai.com/plugins/deploy/connect-chatgpt) - [OpenAI: Connecting custom MCP servers in ChatGPT](https://help.openai.com/en/articles/12584461-connecting-custom-mcp-servers-in-chatgpt)